New Mutants is going to be a film set in the Fox X-Men Universe but will have a very different.horror tone and star many characters that have appeared in any films before. Just because some of these character are lesser known don't for a moment think they are 2nd rate. Remember that Deadpool himself first appeared in New Mutants #98. This film will likely stand on its own but it may have some easter eggs or ties to Deadpool 2.

Wolfsbane

Played by Maise Williams

A Scottish mutant, Wolfsbane possesses the ability to transform into a wolf or into a transitional state somewhere between human and wolf that is similar to a werewolf. She has honed her powers to shift between human and wolf characteristics but must keep her feral instincts at bay when she does.

Magik is the younger sister of the Russian X-Man Colossus. She is a member of a fictional sub-species of humanity known as mutants, who are born with superhuman abilities. Her natural mutant power is the ability to teleport. She also is a capable sorceress.

Cannonball is a mutant who uses the ability to fly at jet speeds while encased in an impenetrable force field. The eldest of a large Kentucky coal mining family, Cannonball is one of few X-Men from a southern, ruralbackground and has maintained the values of civility, hard work, and a strong commitment to his beliefs throughout his career as a superhero. Several of his siblings are also mutants and have joined X-Men-related teams, including his sisters, Paige and Melody, and brothers Jay and Jeb. Other siblings include a brother named Lewis, and four more sisters: Joelle, Elizabeth, Cissie and another unnamed sister.

Cannonball was a founding member of the X-Men's junior team The New Mutants. He joined The New Mutants' later incarnation X-Force, serving as second-in-command and field leader. He joined the X-Men, becoming the first member of a secondary team to "graduate". His tenure was complicated by clashes with superiors and he eventually rejoined X-Force and later the X-Men once more.

A Brazilian mutant, Sunspot possesses the ability to absorb and channel solar power. He is idealistic and impulsive, but is considered a close friend of many of his teammates. He was an important member of the X-Men’s 1980s-era junior team and its reincarnation X-Force.

Danielle Moonstar / Mirage

Played by Blue Hunt

A mutant, Moonstar originally possessed the psionic/psychic ability to telepathically create illusions of her opponents' fears or wishes. She later developed a wide range of psionic and energy manipulation powers. She also developed some magical abilities after a series of adventures in Asgard. She was a member of the X-Men's 1980s junior team the New Mutants and, after a long absence, its reincarnation X-Force.

Dr. Cecililia Reyes is a mutant who turned down Xavier's offer to join him. She went on to become a doctor on her own. In this film she seems to have a secret agenda and likely not a good one.

Trailer:
Josh Boone teased on Instagram that the New Mutants trailer is going to come out on Friday, October 13th. A seeming fitting day for a comic book film that is said to be heavily influenced by horror: